Instant Site Assistant is a tool which helps you navigate Instant Site Editor.
How to Use Instant Site Assistant
When you login for the first time, Instant Site will enable the Assistant by default.
You need to Click on Get Started to navigate Instant Site Editor. If you want to Disable the Assistant you just need to click on Close or X as shown in the Image below:
Enable Assistant
You can always Enable it back again by hovering on Welcome, {username} on the Navigation Bar. You will see a Drop Down List which mentions Enable Assistant.
Click on the button and Instant Site Assistant will be enabled for you.
Disable Assistant
To Disable the Assistant you need to follow the same procedure that you followed to Enable the Assistant. But instead of Enable button you will see Disable Assistant button.
Click on the button and Instant Site Assistant will be disabled for you